SB2023080421 - Reachable assertion in QEMU vhost-vdpa
Published: August 4, 2023
Security Bulletin ID
SB2023080421
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Reachable Assertion (CVE-ID: CVE-2023-3301)
CWE-ID: CWE-617 - Reachable Assertion
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to a reachable assertion. When a peer nic is still attached to the vdpa backend, it is too early to free up the vhost-net and vdpa structures. If these structures are freed here, then QEMU crashes when the guest is being shut down.
Remediation
Install update from vendor's website.